A learned person is someone who has acquired knowledge through study and experience. A BOOKMAN is a person who is knowledgeable about books, a POLYMATH is someone who is knowledgeable in many different areas, a SCHOLAR is someone who is knowledgeable in a particular field, a PUNDIT is someone who is an expert in a certain subject, a SAVANT is someone who is exceptionally knowledgeable in one area, a LUMINARY is someone who is a leader in their field, an ERUDITE is someone who is very knowledgeable, a SAGE is someone who is wise and experienced, and a PEDANT is someone who is overly concerned with details. A SCIENTIST is someone who is knowledgeable in the sciences.